440 Source Heads or 440 Edelbrock Heads??

[cudabob496]

What do the stealth heads flow on the intake?

[momack55]

Dunno cudabob496,

But ANYTHING has to be better than the stock factory cast iron hangin' offa my baby right now!!   

But any input is more than welcome from all!!  I am humbled in the presence of many of the members on here!!  It is very encouraging!!

Mozz!! 

[HP_Cuda]

Regular Stealths =  Intakes flow about 280-290 CFM as cast

Super Stealths =  Intakes flow about 300-320 CFM as cast (spoke to the 440 guys and got this - there is variability though)

What do the stealth heads flow on the intake?

[anlauto]

The prpblem with the 440 source heads is that they come with a cheap set of springs that are probably only any good for a standard replacement camshaft in a bone stock original engine recondition, plus it is a good idea to change out the collets and locks. Depending on how much lift you are going for, the valves would need a change out if going for a large spring pressure in my opinion.

The sales person from 440Source told me right up front that I will need to change the springs if I want to run a rollerized valve train....I applauded his "up-front" honesty

[dodj]

The prpblem with the 440 source heads is that they come with a cheap set of springs that are probably only any good for a standard replacement camshaft in a bone stock original engine recondition, plus it is a good idea to change out the collets and locks. Depending on how much lift you are going for, the valves would need a change out if going for a large spring pressure in my opinion.

I bought the stealths and bought Lunati springs, locks, etc to replace the source ones. After looking at the retainers and locks, i'm glad i did. the keepers don't sit at the same depth in all the retainers.

[cudabob496]

I've got a novel idea! Don't sell the 440 source heads
with crappy valve train components. Why not sell them
with better quality components.  Why sell junk when you
don't have to?  Don't make the customers go to a lot of trouble
replacing components on a new item??  Uh?

[Chryco Psycho]

Well they are designed as a bolt on replacement so having decent springs for 600 lift street cams seems to fit the bill or buy the Super Stealth which come bare maybe with valves & install the matching parts for higher performance

[hemiken]

That is the general consenses, they are sold as a replacement head in standard form. They can not sell their product at one price and accomadate for everyones individual needs. That is why they sell them as an entry level replacement head, and i would not use the springs, retainers or locks they supply for any camshaft that has more than .550 lift personally, any experiance engine builder or person who is buying needs to ask questions before buying performance products. I still like the Stealths for what they are, as they are a good base to start with to build from for a decent performance head, their are better heads out their that flow much better, but these fit the void very well for what they are.

[HP_Cuda]

 

[Sleepychallenger]

What do the factory heads flow in comparison

[cudabob496]

Entry level? I checked their website, and they say 550hp right out of the box, so they should
sell the head with a valve train that would allow you to reliably make that 550 hp.

[hemiken]

I know what you mean Bob, but that is what they offer buddy, only way to change that is buy the parts you need for your personal application is all. I would class that as an entry level head for a tuff streeter, but that is my view of course.

[Moparal]

A friend of mine told me today that 440source has a sale on super stealths going on now at 500 a head.   I told him he needs this Indy 440-1 345 cnc'd complete kit I have on the bench. All the work was done by Dwayne Porter.  These flow 380   he said he has to buy pistons to, so he has to watch his money.  He wont get 900 hp out of super stealths with out an adder.

[hemiken]

Sounds like a good set up Al. Hi Buddy . 380 on the intake is nothing to sneeze at either, wicked flow and the 440 source will not touch them.

[Moparal]

I got 416 on the intake of my B1's 800 lift too. The springs are super strong to hold 1.7 rocker ratio   975 open and 390 closed at the seat